426633221 has 8 divisors (see below), whose sum is σ = 489151104. Its totient is φ = 364507920.

The previous prime is 426633211. The next prime is 426633227. The reversal of 426633221 is 122336624.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 426633221 - 2¹⁴ = 426616837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (426633227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95810 + ... + 100163.

It is an arithmetic number, because the mean of its divisors is an integer number (61143888).

Almost surely, 2^426633221 is an apocalyptic number.

It is an amenable number.

426633221 is a deficient number, since it is larger than the sum of its proper divisors (62517883).

426633221 is a wasteful number, since it uses less digits than its factorization.

426633221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196291.

The product of its digits is 10368, while the sum is 29.

The square root of 426633221 is about 20655.1015732191. The cubic root of 426633221 is about 752.8091516050.

Adding to 426633221 its reverse (122336624), we get a palindrome (548969845).

The spelling of 426633221 in words is "four hundred twenty-six million, six hundred thirty-three thousand, two hundred twenty-one".